Portage
Glacier, Alaska
Portage Glacier. Note the discharge of sub-glacial water and sediment along
the valley wall.

Portage
Lake, Alaska
Dr. Kristine Crossen (Univ. of Alaska Anchorage) discussing a photo from
1910-1915 showing the same landscape behind her in the modern photo. Note
that in the historic photo (reproduced below) Portage Glacier extended nearly
to the terminal moraine, seen at the end of the lake today.

Portage
Lake, Alaska
"The Canyon", 1910-1915 photograph by P.S. Hunt, showing the
west end of Portage Glacier. Compare this view with the 2007 photo above.

Source:
Anchorage Museum of History and Art.

Portage
Lake, Alaska
Dr. Kristine Crossen (Univ. of Alaska Anchorage) on the terminal moraine
at end of Portage Lake. Dr. Crossen used lichenometry and tree ring analysis
to date the moraine to 1852.

Portage
Glacier, Alaska
Portage and Burns Glaciers chronology. Note that Portage Pass was used
as a key transportation route to get from Prince William Sound to Turnagain
Arm (Cook Inlet) and on to Anchorage prior to the WWII railroad tunnel
through the mountain.

Portage
Glacier, Alaska
1951 aerial photograph of Portage Glacier and Portage Lake. Notice the large
number of icebergs in the NE end of the lake.

Matanuska
Glacier, Alaska
Terminal moraine of the Matanuska Glacier. The relatively clean ice in the
background is moving much more quickly than the sediment-rich ice in the
foreground. Maximum velocity at the terminus is approximately 1 foot/day.

Matanuska
Glacier, Alaska
Dr. Kristine Crossen (Univ. of Alaska Anchorage) showing a shear plane on
the Matanuska Glacier. Note the ice axe indicates the dip. Cleaner ice (left)
is flowing at a faster rate than dirtier ice (right) and overriding it,
much like a reverse fault.

Matanuska
Glacier, Alaska
Matanuska Glacier terminus. Note that much of the rocky sediment in the
foreground is underlain by glacial ice. The position of the terminus has
changed relatively little in the past 30 years.

Prince
William Sound, Alaska
Marine chart for portions of College Fiord and Harriman Fiord within Prince
William Sound, AK. During the 1899 Harriman expedition, three glaciers (Barry,
Coxe, and Cascade) had coalesced and extended almost to the junction of
Barry Arm and Harriman Fiord (note moraines on chart - shown in light blue
tone). The captain of the Elder navigated through a small channel between
the glacial terminus and the valley wall, discovering Harriman Fiord. The
glaciers subsequently retreated to their present position by the 1930s and
have changed relatively little since.

Prince
William Sound, Alaska (Barry Arm)
Barry Glacier and Doran Strait at the mouth of Harriman Fiord, Alaska, June
1899. Photographed by C. Hart Merriam. Source: University of Washington.

Prince
William Sound, Alaska (Barry
Arm)
Cascade (left) and Barry (right) Glaciers, at the head of Barry Arm, Prince
William Sound, AK, June 2007. Note the extent of open water that was filled
with glacier ice in the 1899 photo.

Prince
William Sound, Alaska (Harriman Fiord)
The Harriman Fiord and Surprise Glacier, named after the Harriman expedition
discovered this fiord by navigating the narrow channel between the Barry
Glacier and the valley wall.